DE2916340C2 - Device for cutting off two zipper tapes that are coupled to one another - Google Patents

Description

The invention relates to a device for cutting two zipper tapes coupled to one another, which have numerous zipper chains separated from one another by areas free of coupling elements and each provided with a slide and upper and lower limit parts, consisting of a guide table for supporting the zipper tapes, a feed device to the zipper tapes in the longitudinal direction to move over the guide table, a first sensor arranged on the guide, which detects one of the slides resting on the associated upper delimitation part, a second sensor arranged on the guide table, which determines the lower delimitation part following this slider second sensor is normally ineffective and can temporarily be put into operation as a result of a detection of a slide by the first sensor in order to stop the feed device when a lower limiting part is detected, and with a he cutting device for severing the zip ties in the coupling link-free area in front of the determined lower delimitation part after the feed device has been stopped.
In a generic device described in US Pat. No. 4,043,232, the sensors which determine the slide or the delimitation part following the slide operate photoelectrically or electrically in some other way. Experience has shown, however, that with such photoelectric sensors it is difficult to control the stopping of the feed device in such a way that the slide fastener tapes are severed at a precisely predetermined point.

The invention is based on the object of improving the generic device in such a way that that after the feed device has been stopped, there is a precisely predetermined point of the zipper tapes is located in the working area of the cutting device. This object is achieved according to the invention.

that the first sensor that detects the slide has a support arranged on the guide table, one on the support pivotably mounted feeler lever, one supported on the support and the feeler lever and the feeler! usually against the zipper halves has onerous compression spring and a switch which, when the sensing lever is pivoted can be actuated as a result of its engagement with a slide that the determining the lower delimiting part second sensor has a pivotable stop lever relative to the guide table, a device for in Operation has the stop lever and a timer to put the device into operation to actuate the stop lever a certain time interval after actuation of the switch, wherein the Stop lever has a stop, which as a result of the actuation of the device to put into operation of the feeler lever can be introduced into a coupling element-free area.

The fact that the slide or that following it If the sensor detects the limiting part, it can be used to achieve greater accuracy in the work process achieve. This achieves a predetermined value after the feed device has been stopped Place of the zipper tapes is arranged in the working area of the cutting device. The cut ones individual zipper tapes therefore have a uniform length.

Appropriate further developments of the invention emerge from the subclaims.

An embodiment of the invention is shown in the drawing and is explained in more detail below. It shows

F i g. i a schematic side view of a device for cutting off two zipper tapes that are coupled to one another,

F i g. 2 a plan view of one on a larger scale Slide holder of the device according to Fig.!, And

F i g. 3 to 5 the successive work steps when cutting the zipper tapes.

The in F i g. The cutting device 10 shown in FIG. 1 generally consists of one supported on a bed 12 horizontal guide table 11, from a feeder 13 in the form of a gripper, which is arranged near one end of the guide table 11 and opposite this is movable to and fro, a cutting device 14, which is arranged near this one end of the guide table 11 is, a slide sensor 15, which is arranged at this one end of the guide table 11, a gap sensor 16, which is arranged under the guide table 11, and a slide holder 17, which is on other end of the guide table 11 is arranged.

According to FIG. 3 are two zipper tapes 18,19, which are to be burned through with the cutter 10 are coupled together, and they have numerous Zipper chains 20 arranged at a distance from one another in the longitudinal direction and made up of two coupled rows of coupling links, wherein between the slide fastener chains 20 numerous coupling element-free areas or Interstices 21 are located. At the two ends of each slide fastener chain 20 are an upper limit member 22 and a lower limit part 23 attached. Numerous slide 24 for coupling and uncoupling the rows of coupling elements are slidably arranged on the slide fastener chains 20. Like this F i g. 1 as can be seen, the zipper tapes 18, 19 are opened by the gripper 13 in the direction of arrow 25 the guide table 11 step by step from the slide holder 17 via the slide sensor 15 to the cutting device 14 supplied.

The slide sensor 15 consists of a support 26 arranged on the guide table 11 and a Feeler lever 27 which is pivotably mounted on the support 26 with a pivot pin 28, whereby a compression spring 29 is supported on the support 26 and the feeler lever 27 to normally move the feeler lever 27 into one direction to load that the lever end 30 down against the zipper chains of the over the slide fastener tapes 18, 19 fed to the guide table 11 is pressed. A horizontal bar 31 extends from the sensing lever 27 and carries at its distal end a switch actuating pin 32, the normally engaged with a microswitch 33. A presser foot 34 protrudes from the support 26 against it the end of the guide table 11 obliquely downwards to the zipper tapes 18, 19 downwards against to press the guide table 11.

The cutting device 14 consists of an upper movable knife 36 and eirv .-. I under the movable Knife 36 fixed angeora «e'fin knife 37. wherein the zipper tapes 18, 19 can be moved through between the movable and the stationary knife 36 and 37 are. When the movable knife 36 is moved towards us, it acts with the stationary one Knife 37 together to cut the zipper tapes 18, 19. On the movable knife 36 A horizontal rod 38 is attached which carries a switch operating pin 39 which is connected to a limit switch 40 comes into engagement to operate this when the movable knife 36 is lowered and in the In cooperation with the stationary knife 37, the zipper tapes 18, 19 severed.

The bed 12 has two mutually spaced upwardly projecting arms 42, 43 which are positioned between them extending guide block 44, the guide block 44 with respect to the guide table 11 is stationary and arranged under the same. A carriage 45 extends horizontally through the block 44 and can be moved relative to this. The carriage 45 has brackets 46 arranged i-white at a horizontal distance (only one of which is shown in FIG. 1), on which, by means of a pivot pin 48, an iiorizo.valer stop lever 47 is pivotally mounted. which is arranged under the guide table 11. The stop lever 47 has a stop finger 49 at its distal end, which passes through a slot 50 in the guide table 11 protrudes upwards. The stop finger 49 is in the direction of movement of the zip fasteners 18, 19 arranged behind the lifting end 30 of the feeler lever 27. The stop lever 47 is mounted around the pivot pin 48 and can be pivoted downwards so that the stop finger 49 protrudes above the guide table 11 above or is drawn down into the slot 50.

A vertical Si.halterbetreibstange 51 is on attached to the slide 45 with a threaded bolt 52 which is screwed into a bore 53 of the slide 45 is, wherein a compression spring 54 and a pin 55 are slidably disposed in the bore 53. The compression spring

54 is supported on the threaded bolt 52 and the pin

55 from, with one end of the pin 55 talking out of the bore 53 on the stop lever 47 below of the pivot pin 48 is applied so that the stop lever 47 tries to rotate upwards. Another Threaded bolt 56 is screwed into the vertical rod 51 and the carriage 45, one unthreaded End area 57 of bolt 56 in a blind bore 58

of the block 44 is slidably arranged. In the blind hole 58 a compression spring 59 is arranged, which is supported on the threadless end region 57 to the To load carriage 45 normally in one direction, that a arranged on the rod 51 Schaltcrbetetriebboizen 60 is held at a distance by a microswitch 61 attached to the bed 12. The microswitch 61 is connected to a control circuit (not shown) for the gripper 13, and it interrupts in the case of actuation, the feed movement of the gripper 13.

On the bed 12 is a device 62 (solenoid for operating the feeler lever) with a vertical one Plunger 63 arranged, which has a pin 64 which is in a horizontal slot 65 of the stop lever 47 Ιο-se engages, the stop lever 47 being connected to the plunger piston 63 by this sliding block connection is horizontally movable. When the solenoid 62 is energized, the stop lever 47 can move around the Geierik / apfcn 48 i twist above so that the connection: o striking finger 49 arranged above the guide table 11 is. The solenoid 62 is for switching off with the limit switch 40 connected in series. The energization of the solenoid 62 is controlled by a timer 66, which is connected to the microswitch 33 in series. 2ί

As shown in FIG. 2, the slide holder 17 consists of one on the guide table 11 arranged housing 70 of two horizontal fingers 71, 72, which are slidably mounted in the housing 70 and have opposing clamping surfaces 73, 73, each around a slide 24 to be held together between them, and from a tension spring 75 acting on the fingers 71, 72, around them normally burdening each other. When the zipper tapes 18, 19 in the direction of arrow 76 are moved, then the slide 24 is gripped by the clamping surfaces 73,74 of the fingers 71,72 and remains sandwiched between these; until the slide 24 with comes into contact with the upper limit part 22, whereupon the advancing movement of the slide fastener tapes 18, 19 pushes the slide 24 with the upper delimiting part 22 past the fingers 71, 72. The on the slide fastener chains 20 arranged sliders 24 are therefore one by one against the upper ones End stops 22 displaced when the zipper tapes 18, 19 moves past the slide holder 17 will.

According to FIG. 1 is a roller 77 by means of a bracket 78 near the slide holder 17 on the guide table 11 freely rotatable. The zipper tapes 18, 19 are so wrapped around the roll 77 during feeding out on the guide yoke 11.

During the advancement of the slide fastener tapes 18, 19, each slider 24 is in the slider holder 17 relocated and brought into contact with the associated upper end stop 22 (FIG. 3). The progressive Movement of the zipper tapes 18, 19 causes a slide 24 to contact the lever end 30 of the feeler lever 27 comes into contact and lifts it, whereupon the feeler lever 27 does not turn upwards and thereby opening microswitch 33 to start timer 66. A certain time interval, after the microswitch 66 is activated, it energizes the solenoid 62 to the plunger 63 to move upwards, whereupon the stop lever 47 is raised so that its stop finger 49 after protrudes above the guide table 11 The time delay is chosen so that the stop finger 49 penetrates into the coupling element-free area 21, after the slide 24, which has actuated the feeler lever 27. moved past the stop finger 49 has (Fig. 4).

The stop finger 49 then comes into engagement with the lower limiting part 23 (FIG. 5) and is forcibly moved forward by the advancing movement of the fastener straps 18, 19. The stop lever 47 and consequently the carriage 45 are therefore pulled forward against the force of the spring 59 until the microswitch 61 is actuated by the actuating bolt 60, whereby the cutting device 14 is set in motion. When the movable knife 36 moves down and cuts the zipper tapes 18,19. then it actuates the microswitch 40, whereby the solenoid 62 is switched off. The plunger 63 is withdrawn in order to pull the stop finger 49 down into the slot 50 and to separate it from the lower limiting part 23, whereupon the Arisch! Ti "hcfcc! 47 and the ^{shaker 1} ^^ nntpr for the biasing force of the spring 59 are withdrawn to move the actuating pin 60 away from the microswitch 61.

For this purpose 2 sheets of drawings

Claims (7)

Patent claims: 1. Device for cutting two coupled zipper tapes, the numerous areas separated from each other by coupling element-free areas and each with a slide and an upper one and lower limit parts provided slide fastener chains, consisting of a Guide table for supporting the zipper tapes, a feeding device around the zipper tapes to move in the longitudinal direction over the guide table, one arranged on the guide table first sensor, each of which has one of the adjacent upper delimitation parts Slide detected, a second sensor arranged on the guide table, which applies to this slide the following lower limit part is determined, whereby the second sensor is normally ineffective and is temporarily put into operation as a result of a detection of a slide by the first sensor, at! if a lower limit is found stop the feeding device, and with a cutting device for cutting through the zipper tapes in the area free of coupling elements in front of the determined lower boundary part stopping the feeder, thereby characterized in that the first sensor detecting the slide (24) has one on the guide table (II) arranged support (26), a feeler lever (27) pivotably mounted on the support, a self on the soup and the feeler lever and the feeler lever normally against the zipper halves (18, 19) has a loading compression spring (29) and a switch (33) which, when pivoted of the sensing lever (27) as a result of its engagement with a slide (24) can be actuated that the the second sensor, which detects the lower delimitation part (23), is pivotable relative to the guide table (11) Stop lever (47), a device (62) for putting the stop lever into operation and a time switch (66) to the device for putting the stop lever into operation a certain Time interval after actuation of the switch (33) to operate, the stop lever (47) has a stop (49) which, as a result of the actuation of the device (62) for putting into operation of the sensing lever can be inserted into a coupling element-free area (21). 2. Device according to claim 1, characterized in that the lower delimitation part (23) Detecting second sensor comprises a switch (61) which, as a result of the engagement of the coupling element-free Area (21) introduced stop (49) with the lower delimitation part (23) of an adjacent one Zipper chain (20) can be actuated to stop the feed device (13). 3. Apparatus according to claim 2, characterized in that the lower delimitation part (23) The second sensor that detects has a slide (45) which is displaceable with respect to the guide table (11), wherein the stop lever (47) is pivotably mounted on the carriage and the carriage at Engagement of the stop (49) with the lower limiting part (23) is displaceable, and a switch operating member (60), which is arranged on the carriage (45), to the switch (61) as a result to actuate the displacement of the slide. 4. Apparatus according to claim 3, characterized in that that the second sensor determining the lower delimitation part (23) has a spring (59), which acts on the carriage (45) to the switch operating member (60) away from the switch (61). 5. Apparatus according to claim 4, characterized in that the lower limiting part (23) second sensor detects one in relation to the ίο guide table (11) has stationary block (44), wherein the carriage (45) is slidably supported by the block and the spring (59) on the block and attacks on the sled. 6. Device according to one of the preceding claims, characterized in that on the Guide table (11) a slide holder (17) is arranged, which always has one of the slide (24) on one the delimitation parts (22) of the respective slide fastener chain (20) in plant. 7. Vorrich'ung according to claim 6, characterized in that that the slide holder (17) has a housing (70) arranged on the guide table (1!), two in the housing slidably mounted fingers (71, 72) and a spring (75) which the fingers press against each other so that they together hold one slide (24) between them.